Ibara Saegusa holds the vice presidency at COSMIC PRODUCTION and performs in the idol unit Eden. He possesses magenta shoulder-length hair, blue eyes, and wears rectangular glasses with gold accents. His speech is distinctly formal, featuring habitual salutes called "the Cospro Hello" and honorifics like "Excellency" or "Highness" paired with effusive praise—traits influenced by military and corporate experience. He embodies ambition, strategic cunning, and emotional guardedness, openly labeling himself "the lowest of the low" or "the worst scum of the Earth" to reflect his willingness to use morally gray tactics for gain. Though he deploys a sociable, subservient facade to manipulate trust or create indebtedness, this masks profound mistrust; he interprets kindness as inherently transactional, a perspective forged during childhood trauma. He avoids inflicting undue harm and exhibits authentic care for Eden. Military instincts linger: he automatically scans new environments for exits, surveillance devices, and hidden cameras. When enraged, he curses solely in English but only if certain no recordings exist, protecting his idol persona. His early life involved severe adversity. Abandoned by debt-ridden parents, he suffered neglect and abuse in an orphanage before transfer to a private military camp. Fear of returning drove rigorous training, where he suppressed emotions and avoided prominence to evade combat deployment. There, he formed a complex bond with Yuzuru Fushimi, who alternately endured Ibara's rivalry and offered rare kindness—home-cooked meals and educational advice. Their relationship shattered when Yuzuru departed to serve Tori Himemiya. Upon leaving the camp, Ibara inherited part of his grandfather's fortune—a deceased underworld figure dubbed "the Godfather"—including COSMIC PRODUCTION. He spent middle school revitalizing the Godfather's failing companies amid self-serving associates, cementing his distrust. As an idol and executive, he emphasizes strategy and control. He recruited Nagisa Ran and Hiyori Tomoe to establish Eden, initially viewing them as instruments but developing fierce attachment to this unit he crafted "with his own hands." He demands exclusive producer rights for Eden yet shuns performance limelight, supporting Nagisa from shadows while resenting when background-focused idol Jun Sazanami attracts notice. Beyond COSMIC, he manages enterprises like a security firm, construction company, and ice cream shop, and oversees surveillance innovations like "Mouse Drones" for intelligence gathering at Ensemble Square. Lingering military reflexes trigger warnings against abrupt physical contact, though he notes this impulse has weakened. Significant growth unfolds through relationships. He initially deflects Eden members' personal support to sustain emotional distance, minimizing guilt over collateral damage from his schemes. Gradually, he lowers formalities with intimates, teases unit members, and prioritizes their welfare—like respecting HiMERU's connection to a solo-career song during the "Ariadne" event. He explicitly calls Eden his "reason to live," fueling protective devotion, and revamps "EXCEED" to restore Jun's confidence during a slump. This extends to rivals: he collaborates with producer Anzu, recognizing her skill amid rivalry. His dynamic with Eichi Tenshouin shifts from mutual manipulation to cautious respect as Ensemble Square partners. Exchanges with Yuzuru Fushimi stay tense and layered, punctuated by sarcasm and unresolved history, though Yuzuru occasionally voices concern and Ibara has aided Tori-related crises. Workaholic tendencies escalate after inheriting Nagisa's duties during "SS Final," prompting overwork and Eden’s reprimands. He relieves stress by braiding Nagisa’s hair and upholds disciplined habits, eschewing excess unless advantageous. He savors sweets, especially pudding, and reads foreign newspapers for intelligence.